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Electron microscopy of InGaN nanopillars spontaneously grown on Si(111) substrates

journal contribution
posted on 08.02.2016, 15:59 by T. Kehagias, Danis Kerasiotis, A.P. Vajpeyi, I. Hausler, W. Neumann, A. Georgakilas, G.P. Dimitrakopulos, P. Komnninou
The mopholological, structural and chemical properties of InxGa1−xN nanopillars directly grown on Si (111) substrates, by molecular beam epitaxy, were investigated employing transmission electron microscopy related techniques. Single crystalline, single phase nanopillars were observed exhibiting a low density of crystal defects, which contribute to good crystal quality. Initial nanostructures merge through subgrain boundaries to form final nanopillars. Energy dispersive X-ray analysis revealed a very low InN mole fraction near the interface with the substrate, owing to high desorption rates from the elevated growth temperature, and gradually higher In incorporation rates near the tips of the nanopillars. This compositional fluctuation is main- tained due to poor segregation of indium adatoms along the c-axis of the nanopillars towards the Si interface. A second species of long and narrow nanopillars was found In-free.

Funding

Support by the FP7 NMP3-LA-2008 “MORGAN” Grant Agreement 214610 is acknowledged.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

physica status solidi (c)

Volume

7

Issue

5

Pages

1305 - 1308

Citation

KEHAGIAS, T. ...et al., 2010. Electron microscopy of InGaN nanopillars spontaneously grown on Si(111) substrates. Physica Status Solidi(c), 7(5), pp. 1305-1308.

Publisher

© Wiley

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2010

Notes

This paper is in closed access.

ISSN

1862-6351

Language

en

Exports

Loughborough Publications

Keywords

Exports